661970022892 has 6 divisors (see below), whose sum is σ = 1158447540068. Its totient is φ = 330985011444.

The previous prime is 661970022851. The next prime is 661970022893. The reversal of 661970022892 is 298220079166.

661970022892 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×661970022892² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (661970022893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82746252858 + ... + 82746252865.

Almost surely, 2^661970022892 is an apocalyptic number.

It is an amenable number.

661970022892 is a deficient number, since it is larger than the sum of its proper divisors (496477517176).

661970022892 is a wasteful number, since it uses less digits than its factorization.

661970022892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165492505727 (or 165492505725 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 661970022892 in words is "six hundred sixty-one billion, nine hundred seventy million, twenty-two thousand, eight hundred ninety-two".